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/*
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/*
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 * Copyright (c) 2006 Jakub Jermar
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 * Copyright (c) 2006 Jakub Jermar
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 * Copyright (c) 2008 Jakub vana
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 * All rights reserved.
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 * All rights reserved.
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 *
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * modification, are permitted provided that the following conditions
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 * are met:
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 * are met:
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 */
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 */
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#include <ddi/ddi.h>
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#include <ddi/ddi.h>
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#include <proc/task.h>
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#include <proc/task.h>
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#include <arch/types.h>
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#include <arch/types.h>
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#include <mm/slab.h>
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#include <errno.h>
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#define IO_MEMMAP_PAGES 16384
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#define PORTS_PER_PAGE  4
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/** Enable I/O space range for task.
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/** Enable I/O space range for task.
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 *
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 *
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 * Interrupts are disabled and task is locked.
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 * Interrupts are disabled and task is locked.
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 *
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 *
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 * @param task Task.
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 * @param task      Task.
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 * @param ioaddr Startign I/O space address.
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 * @param ioaddr    Starting I/O space address.
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 * @param size Size of the enabled I/O range.
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 * @param size      Size of the enabled I/O range.
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 *
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 *
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 * @return 0 on success or an error code from errno.h.
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 * @return 0 on success or an error code from errno.h.
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 */
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 */
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int ddi_iospace_enable_arch(task_t *task, uintptr_t ioaddr, size_t size)
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int ddi_iospace_enable_arch(task_t *task, uintptr_t ioaddr, size_t size)
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{
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{
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    if (!task->arch.iomap) {
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        uint8_t *map;
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        task->arch.iomap = malloc(sizeof(bitmap_t), 0);
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        map = malloc(BITS2BYTES(IO_MEMMAP_PAGES), 0);
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        if(!map)
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            return ENOMEM;
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        bitmap_initialize(task->arch.iomap, map, IO_MEMMAP_PAGES);
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        bitmap_clear_range(task->arch.iomap, 0, IO_MEMMAP_PAGES);
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    }
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    uintptr_t iopage = ioaddr / PORTS_PER_PAGE;
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    size = ALIGN_UP(size + ioaddr - 4 * iopage, PORTS_PER_PAGE);
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    bitmap_set_range(task->arch.iomap, iopage, size / 4);
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    return 0;
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    return 0;
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}
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}
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/** @}
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/** @}
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 */
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 */